NVIDIA RTX 4090 Laptop vs NVIDIA RTX 5070 Ti Laptop
Which graphics card is better for running local language models? Here is how the NVIDIA RTX 4090 Laptop (16 GB) compares against the NVIDIA RTX 5070 Ti Laptop (12 GB) in real memory headroom, supported model architectures, and generation speed.
NVIDIA RTX 4090 Laptop
- Memory Bandwidth: 576 GB/s (GDDR6 256-bit)
- Fits fully in VRAM: 34 popular models
- Power Draw (TDP): 150W
- Largest recommended (Q4): 20B–22B
NVIDIA RTX 5070 Ti Laptop
- Memory Bandwidth: 672 GB/s (GDDR7 192-bit)
- Fits fully in VRAM: 33 popular models
- Power Draw (TDP): 115W
- Largest recommended (Q4): 14B
The AI Local Check Verdict: Which GPU should you buy for AI?
The Classic Headroom vs Speed Trade-off: The NVIDIA RTX 4090 Laptop has 4 GB more VRAM, allowing it to fit larger models that cannot run locally on the NVIDIA RTX 5070 Ti Laptop.
However, the NVIDIA RTX 5070 Ti Laptop has a higher memory bandwidth (672 GB/s vs 576 GB/s). For models that comfortably fit in 12 GB VRAM, the NVIDIA RTX 5070 Ti Laptop will generate tokens roughly 17.0% faster. Choose the NVIDIA RTX 4090 Laptop if you prioritize model size flexibility, or the NVIDIA RTX 5070 Ti Laptop if you prioritize token generation speed on models up to 12 GB.
Models that fit on NVIDIA RTX 4090 Laptop, but NOT on NVIDIA RTX 5070 Ti Laptop
These models run entirely in GPU VRAM on the NVIDIA RTX 4090 Laptop, but require slow system RAM offload on the NVIDIA RTX 5070 Ti Laptop:
| Model | Size | Downloads | NVIDIA RTX 4090 Laptop | NVIDIA RTX 5070 Ti Laptop |
|---|---|---|---|---|
| LiquidAI/LFM2.5-24B-A2B-GGUF | 23.97B | 226,121 | Fits in VRAM | Offload (Slow) |